Use new TF wheels with CUDA 7.0 capability support (#942)

http://b/178104927

Author: rosbo

Dockerfile

@@ -1,7 +1,7 @@
 ARG BASE_TAG=m61
 ARG TENSORFLOW_VERSION=2.4.0
 
-FROM gcr.io/kaggle-images/python-tensorflow-whl:${TENSORFLOW_VERSION}-py37-2 as tensorflow_whl
+FROM gcr.io/kaggle-images/python-tensorflow-whl:${TENSORFLOW_VERSION}-py37-3 as tensorflow_whl
 FROM gcr.io/deeplearning-platform-release/base-cpu:${BASE_TAG}
 
 ADD clean-layer.sh  /tmp/clean-layer.sh

gpu.Dockerfile

@@ -1,7 +1,7 @@
 ARG BASE_TAG=staging
 
 FROM nvidia/cuda:10.2-cudnn7-devel-ubuntu18.04 AS nvidia
-FROM gcr.io/kaggle-images/python-tensorflow-whl:2.4.0-py37-2 as tensorflow_whl
+FROM gcr.io/kaggle-images/python-tensorflow-whl:2.4.0-py37-3 as tensorflow_whl
 FROM gcr.io/kaggle-images/python:${BASE_TAG}
 
 ADD clean-layer.sh  /tmp/clean-layer.sh